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3 preset test procedures

3.1 Preparation period included in the test

Make a safety net around the experiment, and stick a warning sign on the safety net, and conduct the experiment in strict accordance with the relevant regulations. There must be special guards around the safety net, and the rigorous approach of irrelevant personnel may cause unnecessary consequences. The person in charge should be a professional. When conducting high-voltage tests on transformers, safety is the primary consideration and must not be ignored, otherwise it will cause unnecessary casualties. During the pressure test, professionals should connect the voltage and circuit, work conscientiously, and be comprehensive.

3.2 Key points of the test

During the test, there must be more than two personnel to cooperate, point out one person in charge, and the other personnel to cooperate in the test. The personnel in each link must be clearly divided and perform their duties. Test personnel must have a certain degree of safety awareness. Personnel who are not familiar with the test process are not allowed to perform this job to avoid safety accidents. The person in charge must conduct a meticulous and thoughtful inspection of each link of the test. After ensuring that the work is correct, they can evacuate to the outside of the safety net, and can stop the inspection after ensuring that everyone has evacuated.

The equipment used in the test should be checked, such as the inspection of meters and capacity, etc.; the wiring of the equipment should be marked to avoid wiring errors. When all the preparations are in place, the person in charge shall issue a closing instruction, and then a special person will close the switch. During the test, all participants must be fully committed, serious and responsible, and not careless or careless. The person in charge must conduct a unified command for the test, and handle it calmly when an emergency occurs.

3.3 Inspection in the subsequent period

After the test, the wiring of the equipment and the safety net should be removed carefully, and the survey should be carried out carefully to eliminate various hidden dangers. In fact, it is easy to overlook the inspection during the subsequent period. It is necessary to focus on checking the connection status of the instrument and whether the gates of each category have been disconnected.

4 Matters needing attention in the use of high-voltage transformers

First, connect the line. In addition to connecting the various lines during the test, the transformer must be grounded to the shell of the operating system. At the same time, the end of the high-voltage winding and the measuring winding must be safely grounded.

Secondly, precautions during the boost process. When the voltage regulator is at zero, close the switch. At this time, the voltage will be increased at a constant speed, and it needs to be increased to the position of the rated voltage. At this time, the pointer of the meter must be observed. If an abnormal phenomenon occurs, immediately disconnect the electricity, make an inspection, and then continue the test. In the course of the experiment, the iron core of the transformer must be grounded, because according to its working principle, it can be known that if it is not grounded, it will cause an electric shock accident.

5 Conclusion

To sum up, safety is the most important issue for power tests. When conducting high-voltage power tests, most of the test links need to be completed by the staff personally, which requires higher safety issues and involves many safety factors. In order to improve the safety factor in the test process, each tester must clarify their own responsibilities, clarify the purpose and method of the test, and perform their duties to improve the accuracy of measurement. The person in charge of the test must set an example, give full play to his role, do a good job of inspection and preparation before the test, control the key links during the test, and achieve the purpose of improving the reliability of electrical equipment while improving the accuracy of the test data.